Vacuum breaker



May 7, 1940. MARSAK 2,200,033

VACUUM BREAKER Filed June 2'7, 1939 INVENTQR ATTORNEYS Patented May 7, 1940 UNITED STATES PATENT OFFICE 5 Claims.

.into the water supply system. Therefore, in many localities, it is mandatory that newly installed flush valves be equipped with a vacuum breaker.

An object-of this invention is a vacuum breaker which is of simple and sturdy structure, low manufacturing cost, quiet and highly eificient in operation, easy to install or replace and in effect constitutes an integral part of the flush valve tail-piece.

Other objects, novel features and advantages of this invention will become apparent from the following specification and accompanying drawing, wherein:

Fig. 1 is a vertical section through a flushing valve tail-piece equipped with avacuum breaker embodying the invention;

Fig. 2 is a section similar to Fig. 1 at right angles thereto, partly in elevation.

Fig. 3 is a section on the line 3-3 of Fig. 1, and

Fig. 4 is a perspective view of interior mechanism of the device.

A tubular tail-piece composed of the sections I0 and II leads from the flush valve, not shown, to a device to be flushed, also not shown. The section I 0 is provided with a portion I2 of enlarged diameter, the. lower end of which engages an outwardly turned flange I3 on the section II, the periphery of the flange being flush with the outer surface of the portion I2. A tubular member ll of materially larger diameter than the portion I2 surrounds the latter forming a chamber I8 and is inturned at its lower portion tightly to flt the portion I2 with a flange I6 underlying the flange I3. The flanges I3 and I6 are suitably joined together, for example, bysoldering, and the portion of the tubular member I4 contacting the portion I2 is likewise joined thereto. A tubular member I1 is threaded into the upper end of the section I0 and has a depending portion I8 of hooks 24 which are spaced apart and fit over,

- the chamber l5.

the pin 22 to pivotally support the bracket from the pin. A portion 23 of the bracket extends laterally to substantially the axis of the tailpiece and supports an upstanding pin 26. A valve disk! 21 having a tapered periphery is adapted to engage the' bottom edge I9 ofthe tubular member I! and is equipped with a stud 28 having a downwardly facing socket 29 into which the pin 26 fits. A handle member 30 which may be part of stud 28 is provided on the disk 21 for lifting the disk off from and on to the pin 26.

The wall of the portion I2 is cut away below the pin 22 at one side to provide a passageway 3|, the bottom of which is flush with the bottom of A closure 32 preferably of rubber or similar resilient material and shaped to close the passageway 3| is carried by a depending part 33 01 the bracket 23. The part 33 also carries an arm 34 which extends from the bracket through the passageway 3| into the chamber I5. A weight 35 is attached to the arm 34 by a bolt 36, the head of which is accessible through the top of the chamber I5, the weight being of such configuration that it may be passed through the top of the chamber into and out of assembled relation with the arm 34. The top of the chamber I5 is normally covered by an annular cover 31, which is equipped with a plurality of arms 38 engaging the top of the tubular member I4 and offset from the cover sufiiciently to maintain the latter spaced from the top edge of the tubular member Id. The cover 31 is provided with a downturned peripheral flange 39 of sufiicientlyv greater diameter than the tubular member I4 that the chamber I5 is always in full communication with the atmosphere.

When no liquid is flowing through the tailpiece, the parts are in the position shown in Fig. l with the valve 27 seated against the bottom edge I9 of the tubular member I8 and with the closure 32 spaced from the passage 3|, so that the lower portion of the tail-piece is in communication with atmosphere. The parts are held in this position by the weight 35. When liquid is flowing through the tail-piece in the direction of the arrow, the liquid forces the valve 21 down-' wardly to asuflicient extent to bring the closure 32 against the wall of the portion I2, thereby closing the passageway 3| and preventing the flow of liquid outwardly through the passageway. Upon cessation of liquid flow, the parts, due to action of weight 35 are returned by gravity to the position-shown in Fig. 1, thus permitting air to flow inwardly through the passageway 3| into ing therein.

The closure 32 is held in open position byv gravity when there is no water flowing through is supported on the pin 28 with sumcient freedomv of movementthat it readily seats against the bottom edge I8 01 the tubular member II. There are no springs and the'structure is such that it will operate for an indefinite period 01' timewithout appreciable wear..

Due to its construction, the vacuum breaker operates noiselessly and is both simple and economical to manufacture. The vent opens as soon as the flow of liquid stops, thus immediately breaking the vacuum and preventing reverse liquid flow through the tailpiece.

In assemblingthe device above described, the bracket 23 with the weight 85 detached is introduced through the top end of the portion In and the hooks 2t areengaged with the pin 22, it being understood that the tubular portion H has not yet been put in place. The valve disk 21 is then engaged with the pin 26 and the weight 35 is connected to the arm 34 by introducing the weight into proper position through the top of the chamber iii, the cover 38 first having been removed. The weight 35 is then attached to the arm 34 by the bolt 36, it being possible to insert a screw-driver for rotating the bolt 36 through the open top of the chamber 15. After the cover 31 and the tubular member ll have been put in their proper places the device is ready for operation. The removal of the bracket is effected by reversing the procedure just described.

I claim:

1. In combination, a flushing valve tail-piece having a vent passage in its wall and a coaxial valve seat, a. pivot pin extending transversely of said tail-piece adjacent the wall thereof, a bracket having hooks engageable with-said to pivotally support said bracket, a closure carried by said bracket for movement into and out of closing relation to said vent passage, a valve disk supported by said bracket for movement into and out of engagement with said valve seat, an arm extending from said bracket through said passage, and a weight carried by said arm exterior of said tail-piece tending to maintain said closure out of closing relation to said passage.

2. In combination, a flushing valve tail-piece having a vent passage in. its wall and a coaxial valve seat, a pivot pin extending transversely of said tail-piece adjacent the wall thereof, a bracket having hooks engageable with said pin to pivotally support said bracket, a closure carried by said bracket for movement into and out of the tail-piece and thus break the vacuum exlsting said pin and adapted i'ormovement by said bracket into and out or engagement with said valve seat, an arm extending from said bracket through said passage, and a weight carried bysaid and exterior of said tail-piece tending to maintain said closure out of closing relation to said passage.

3. In combination, a flushingvalve tail-piece having a vent passage in its wall, a pivot pin extending transversely of said tail-piece adjacent the wall thereof, a bracket having hooks engageable with said pin to pivotally support said bracket and having a portion extending into the path of liquid flowing through said tail-piece, a closure carried by. said bracket for movement into and out of closing relation to said vent passage, an arm extending from said bracket through said passage, and a weight carried by said arm exteriorof said tail-piece tending to maintain said closure out or closing relation to said passage.

4. In combination a flushing valve tail-piece having a vent passage in its wall, a tubular memsaid bracket, a valve disk having a recess receiv- 1 carried by said bracket for movement into and terior of said tail-piece and tending to maintain said closure out of closing relation to said passage.

5. In combination, a flushing valve tail-piece having a coaxial valve seat and having a vent passage in its wall, a tubular member surrounding said tail-piece in spaced relation thereto and having one end intumed into engagement with the tail-piece at the lower edge of the vent passage, a pivot pin extending transversely of said tail-piece adjacent the wall thereof, a bracket having hooks engageable with said pin to pivotally support said bracket, a disk supported by said bracket for movement into and out of engagement with said valve seat, a closure carried by said bracket for movement into and out ofclosing relation to said vent passage, an arm extending from said bracket through said passage, a weight carried by said arm exterior of said tail-piece and tending to maintain said closure in closing relation to said vent passage and said valve disk out of engagement with said valve seat.

BERNARD MARSAK. 

